Automatic Lighting/Rain Sensor Input Test

NOTE:

	Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
	If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
	Before testing, make sure the No. A21 (10 A) fuse in the under-hood fuse/relay box is OK.

1.	Press the engine start/stop button to select the OFF mode.

2.	Disconnect the automatic lighting/rain sensor 5P connector.

Inspect the connector and socket terminals to be sure they are all making good contact:

	If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
	If the terminals are OK, go to step 4.

Reconnect the connector, and do the following input tests:

	If any test indicates a problem, find and correct the cause, then recheck the system.
	If all the input tests prove OK, replace the automatic lighting/rain sensor.

Cavity

Wire

Test condition

Test: Desired result

Possible cause if desired result
is not obtained

WHT

Under all conditions

Measure the voltage to ground:
There should be battery voltage.

	Blown No. A21 (10 A) fuse in the under-hood fuse/relay box
	Faulty under-dash fuse/relay box
	An open or high resistance in the wire

BLK

All power modes

Check for continuity to ground:
There should be continuity.

	Poor ground (G501)
	An open or high resistance in the ground wire

YEL

Combination light switch in any position, other than headlight ON.

Measure the voltage to ground:
There should be about 5 V.

An open or high resistance in the wire